A:
Positive:
1 x 388686137 x 555265917 x 228638929 x 134029749 x 793237119 x 326627203 x 191471493 x 78841833 x 466611421 x 273531609 x 241573451 x 11263
Negative:
-1 x -38868613-7 x -5552659-17 x -2286389-29 x -1340297-49 x -793237-119 x -326627-203 x -191471-493 x -78841-833 x -46661-1421 x -27353-1609 x -24157-3451 x -11263
Unfortunately, there's not simple formula to identifying all of the factors of a number and it can be a tedious process when trying to identify the divisors of larger numbers. To find the factor combinations of the number 38,868,613, it is easier to work with a table - it's called factoring from the outside in.
We start by creating a table and writing 1 on the left side and then the number we're trying to find the factors for on the right side in a table. Then, below that, write the numbers as a negative as well.
| 1 | 38,868,613 | |
| -1 | -38,868,613 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 38,868,613.
Example:
1 x 38,868,613 = 38,868,613
and
-1 x -38,868,613 = 38,868,613
Notice both answers equal 38,868,613
With that explanation out of the way, let's continue. Next, we take the number 38,868,613 and divide it by 2:
38,868,613 ÷ 2 = 19,434,306.5
If the quotient is a whole number, then 2 and 19,434,306.5 are factors. In this case, the quotient is not a whole number. Don't write anything down and try the next divisor.
Here is what our table should look like at this step:
| 1 | 38,868,613 | |
| -1 | -38,868,613 |
Now, we try dividing 38,868,613 by 3:
38,868,613 ÷ 3 = 12,956,204.3333
If the quotient is a whole number, then 3 and 12,956,204.3333 are factors. In this case, the quotient is not a whole number. Don't write anything down and try the next divisor.
Here is what our table should look like at this step:
| 1 | 38,868,613 | |
| -1 | -38,868,613 |
Let's try dividing by 4:
38,868,613 ÷ 4 = 9,717,153.25
If the quotient is a whole number, then 4 and 9,717,153.25 are factors. In this case, the quotient is not a whole number. Don't write anything down and try the next divisor.
Here is what our table should look like at this step:
| 1 | 38,868,613 | |
| -1 | 38,868,613 |
If you did it right, you will end up with this table:
| 1 | 7 | 17 | 29 | 49 | 119 | 203 | 493 | 833 | 1,421 | 1,609 | 3,451 | 11,263 | 24,157 | 27,353 | 46,661 | 78,841 | 191,471 | 326,627 | 793,237 | 1,340,297 | 2,286,389 | 5,552,659 | 38,868,613 |
| -1 | -7 | -17 | -29 | -49 | -119 | -203 | -493 | -833 | -1,421 | -1,609 | -3,451 | -11,263 | -24,157 | -27,353 | -46,661 | -78,841 | -191,471 | -326,627 | -793,237 | -1,340,297 | -2,286,389 | -5,552,659 | -38,868,613 |
Here are some more numbers to try:
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